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during a daytime football game you notice that a players reflective helmet forms an image of the sun 46cm behind the
a 297-kg motorcycle is accelerating up along a ramp that is inclined 306deg above the horizontal the propulsion force
two blocks of mass m1 80 kg and m3 65 kg connected by a rod of mass m2 15 kg are sitting on a very low-friction
suppose we hang a heavy ball with a mass m 17 kg so the weight is mg from a steel wire 25 m long that is 2 mm in
a hanging iron wire with diameter 015 cm is initially 24 m long when a 184 kg mass is hung from it the wire stretches
two long parallel wires separated by 500 cm carry currents in opposite directions the current in one wire is 145 a and
a ball is thrown horizontally from a cliff of height h at the very same moment a truck is passing by the base of the
an object with mass m1 320 kg rests on a frictionless horizontal table and is connected to a cable that passes over a
a 56-kg bucket of water is raised from a well by a rope if the upward acceleration of the bucket is 38 ms2 find the
jack and jill are maneuvering a 3400 kg boat near a dock initially the boats position is lt 2 0 3 gt m and its speed is
a planet of mass 700 1025 kg is in a circular orbit of radius 600 1011 m around a star the star exerts a force on the
a mass m1 47 kg rests on a frictionless table and connected by a massless string over a massless pulley to another
consider adding four phasors of equal amplitude due to four point sources in a line what orientation gives sum of
a soccer ball is kicked with an initial horizontal velocity of 120 ms and an initial vertical velocity of 190 ms1 what
a hare and a tortoise compete in a race over a straight course 100 km long the tortoise crawls at a speed of 0200 ms
two forces 1 and 2 act on the 500 kg block shown in the drawing the magnitudes of the forces are f1 575 n and f2 225
a mass m 110 kg rests on a frictionless table and accelerated by a spring with spring constant k 40930 nm the floor
in an electron microscope there is an electron gun that contains two charged metallic plates 265 cm apart an electric
a certain solid-propellant model rocket engine releases a total of 6000 j of energy as it burns if this engine carries
an ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length l
solenoids produce magnetic fields that are relatively intense for the amount of current they carry to make a direct
a battery supplies 077 a to three resistors connected in parallel the current through the first resistor is 030 a and
a block weighing 1082 n rests on a 34deg inclined planea find the normal force exerted by the plane on the blockb find
the speed of the tip of the minute hand on a town clock is 000125 mswhat is the speed of the second hand of the same
a skier of mass 65 kg skis straight down a 11deg slope at constant velocitya find the value of the normal forceb the